Atari 400 Technical Reference Manual page 240

NMI Interrupt Vectors
P10 VDSLST [0200,2J -- Display-list interrupt vector
This vector is not used by the OS. See Section
o.
P11 VVBLKI [0222,2J -- Immediate VB LANK vector
This vector is initialized to point to the
as
stage 1 VB LANK
P12 VVBLKD C0224,2l -- Deferred VB LANK vector
This vector is initialized to point to the
as
VBLANK exit routine.
See Section 6.
IRQ Interrupt Vectors
P13 VIMIRQ [0216,2J -- General IRQ vector
This vector is initialized to point to the
as
IRQ interrupt
processor. See Section 6.
P14 VPRCED [0202,2J -- Serial
110
bus proceed signal
The serial bus line that produces this interrupt is not used in the
current system. See Section 6.
P15 VINTER [0204,2J -- Serial 1/0 bus interrupt signal
The serial bus line that produces this interrupt is not used in the
current system. See Section
o.
P16 V[BREAKJ [0206,2J -- BRK instruction vector
This vector is initialized to ~oint to a PLA, RTI se~uenc. as the
as
proper does not utilize the aRK instruction. See Section 6.
P17 VKEYBD [0208,2J -- Keyboard interrupt vector
This vector is initialized to point to the Keyboard Handler's
interrupt service routine. See Section 6 and the discussion
preceding E1.
OPERATING SYSTEM C016555 -- Appendix L
255